Combined audio and video switchbox



FIG. 1 is a perspective view of our new design as seen from the front, top and left side of the combined audio and video switchbox;

FIG. 2 is a top view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a back view thereof; and,

FIG. 7 is a bottom view thereof.

The elements shown in broken lines are for environmental purposes only and form no part of the claimed design. 

The ornamental design for an combined audio and video switchbox, substantially as shown and described. 